"I think people think that just because I'm easy-going and game to do things I'll just take as little as they offer," she said. "It's not about how much you get, it's about how fair it is."

She added that it's up to every actress to fight for equal pay and to decide if they're "willing to walk away from something."

Seyfried is just one of a many female stars who have been opening up about the sexism they've faced in their careers. Most recently, Rose McGowan called out a prominent comedian over a questionable casting note: